mediumwhat am-i

I dig out tiny caves, and store gold and silver in them. I build bridges out of silver, Make crowns out of gold, But everyone is afraid of me Even the young and old. Who am I?
Common Wrong Answers
“A miner”
A miner does dig and find valuable metals, but they do not typically create bridges or crowns in the context of dental work.
“A jeweler”
A jeweler works with gold and silver to create items, but they do not dig out caves or are typically feared in the same way a dentist might be.
“A treasure hunter”
A treasure hunter seeks valuable items but does not create bridges or crowns and is not associated with the fear that comes with dental visits.